How to Easily Master Format SAMSUNG GALAXY J7 DUO with Safety Hard Reset?

Tips and tricks to fix SAMSUNG GALAXY J7 DUO problems. This phone is release at 2018 using Android Oreo 8.0 as factory default operating system. The screen size is 5.5 inches with 16:9 ratio but it have good screen view because the usage or Super AMOLED for more colorful pictures videos. We can choose to have single or dual simcard slot. This phone still have home button at front body and it is work together as fingerprint sensor. Find more review information about SAMSUNG GALAXY J7 DUO and how to solve troubles at

What is Advantage of SAMSUNG GALAXY J7 DUO Specifications:

GSM 3G HSDPA with 4G LTE, Dual Simcard
LCD 5.5 inches 16:9 ratio
Internal memory 32 GB with 4 GB RAM
External memory microSD maximum 256 GB
Main Camera dual 13 MP (f/1.9, 28mm) + 5 MP (f/1.9), autofocus, LED flash
Front Camera 8 MP, f/1.9 for video conference & selfie photography
Processor Octa-core 2.2 GHz Cortex-A73 & 1.6 GHz Cortex-A53
Operating system Android Oreo version 8.0
Battery Li-Ion 3000 mAh

How to Fix or Problem Solving for Recovery SAMSUNG GALAXY J7 DUO hang or not responding or malfunctions or stuck or freezing or bricked ?

SAMSUNG GALAXY J7 DUO use Exynos 7885 Octo for supporting our daily work. The internal memory use 32 GB with 4 GB RAM for multitasking applications. We also like to know this phone have dedicated slot for external memory microSD maximum 256 GB capacity. The operating system and some factory default applications already installed inside SAMSUNG GALAXY J7 DUO, therefore we will not get full 32 GB free capacity at internal memory. However, we still have big capacity to install several important applications like Facebook, Line Messenger, Whatsapp, Snapchat, Viber, Skype, Telegram, WeChat, Instagram, Blackberry Messenger (BBM). We have to be careful when we need to download new or not famous applications from Google Play Store, because sometime they may contain viruses or malware that can make some trouble if we installed at SAMSUNG GALAXY J7 DUO such as stuck or bricks or hang or bootloop or frozen or LCD touch screen not responsive or LCD screen not responding with our finger touch. These kind of apps usually will not get Verified by Play Protect information.

What do we have to do? First we have to try do soft reset or reboot or restart to remove temporary files or caches that can make some trouble at this phone. If our SAMSUNG GALAXY J7 DUO can boot again, then please directly download one good antivirus applications from Google Play Store like AVAST or NORTON, please choose only one antivirus we like. The antivirus will try to scan all installed applications and give recommendation setting to our phone. If the problems still happen, then next steps is doing hard reset or master format. Please note, doing hard reset will remove or erase all important data, therefore we have to backup all data first before doing master format. Doing hard reset will remove all Google account from SAMSUNG GALAXY J7 DUO. For safety reasons, please do not install any unknown APK files, because it is very easy to make our phone getting trouble.

How to Force Shutdown or Force Soft Reset or Reboot or Restart SAMSUNG GALAXY J7 DUO?

At normal situation, this phone will work without need to restart or soft reset everyday. But onces we get some troubles like hang or LCD touch screen not responsive, usually we just have to remove temporary files and caches by doing reboot or soft reset at our SAMSUNG GALAXY J7 DUO. Please press and hold POWER button until SAMSUNG GALAXY J7 DUO shutdown or turn off by itself. You may also try press and hold POWER + VOLUME DOWN button to shut it down. After it is totally off, then we can press again POWER button to turn it ON. This process will not remove any important data, therefore we can do this process anytime we want. If our SAMSUNG GALAXY J7 DUO still can work properly, but we want to clear temporary files and caches from some applications, then please press and hold POWER button until pop-up menu appear, continue choose Shutdown / Power off / Reboot menu.

How to backup data or Contact at SAMSUNG GALAXY J7 DUO?

We can use microSD external card to copy or move important files using File Manager applications. If our SAMSUNG GALAXY J7 DUO has already signed in with Google account, by default our contact will be synchronize in the background to Google server. Please make sure we check all contact at Google contact server using Internet browse to make sure backup is done.

#Option 1, How to Hard Reset SAMSUNG GALAXY J7 DUO with software menu:

  1. Turn on this phone
  2. Make sure SAMSUNG GALAXY J7 DUO battery already charge properly
  3. Go to menu:Setting >General tab> Backup & Reset > Factory data reset > Reset device
  4. ChooseErase Everything
  5. SAMSUNG GALAXY J7 DUO will do the process to Master Reset to Factory Default

hard reset samsung galaxy j7 duo

#Option 2, How to Hard Reset SAMSUNG GALAXY J7 DUO with Hardware key button:

  1. Make sure the battery of SAMSUNG GALAXY J7 DUO charge properly or battery have more then 50% capacity
  3. Press and hold together :Power Button + Volume Up + Home Button
  4. If the button at number 3 not work, we can try with press and hold togetherPower Button + Volume Up Button
  5. If we see the menu at LCD screen, chooseWipe Data/Factory ResetwithVolume Buttonto select and usePower Buttonto ok or enter.
  6. The SAMSUNG GALAXY J7 DUO will do the process of restoring to factory default.

How to Unlock or Fix or Bypass or Solutions for SAMSUNG GALAXY J7 DUO forgot password code or security lock screen pattern or pin (lost password)?

Dual camera is main advantages of SAMSUNG GALAXY J7 DUO, and Samsung also give good features for each camera because it have already good aperture number at f/1.9 to take better light pictures at low light situations. Front camera for selfie photography also produce with LED light flash, therefore we will not get any problems for selfie photo at low light situations. After use several months, we will have many important files and private pictures videos. We need to activate security protections to make unauthorized people can not access our confidential data when SAMSUNG GALAXY J7 DUO awal from us or lost or stolen. To activate the fingerprint, we need to register our finger hand several time to make it work for unlock, but if we do not want to use fingerprint for any reasons, then we can use screen lock pattern or password pin protection. The problems will be happen when we forgot security answer or fingerprint can not unlock the screen protections, what should we do?

Do not worry because we can unlock or bypass forgotten screen lock pattern or password pin protections at SAMSUNG GALAXY J7 DUO use registered Google account. Please turn ON our phone, when it ask for security answer, please give several time wrong answer continuously until our SAMSUNG GALAXY J7 DUO freezing or locked 30 seconds, at this time we can find Forgot Password / Pattern button, press this button to unlock using Gmail account that we have already sign-in before. If we can not access our Google account, then we have to do hard reset using hardware button combination key


This is the way to help for unlock or bypass forgotten security protection at SAMSUNG GALAXY J7 DUO. Although we are sure about our security protection, but sometime we may forget about the right answer. Please note, when we give security protection at our SAMSUNG GALAXY J7 DUO, it also give step to put our own PIN / PASSWORD as BACKUP PASSWORD / PIN. This backup PIN use to bypass or unlock forgotten security code later. Use above steps to unlock forgot password or screen lock pattern security protection using Google account or Gmail username and password.

Is That Any Secret Code for Doing Format SAMSUNG GALAXY J7 DUO?

We can try to use secret code for doing hard reset SAMSUNG GALAXY J7 DUO is *2767*3855#. But please remember to always be careful typing that code, because the SAMSUNG GALAXY J7 DUO will do hard reset and remove all data also installed applications.

How to Format or Erase Phone Memory at SAMSUNG GALAXY J7 DUO?

There are two phone memory type at SAMSUNG GALAXY J7 DUO, one is internal memory and the other one is external memory. If we want to format internal memory phone then we have to do hard reset or reformat the operating system of SAMSUNG GALAXY J7 DUO as well. Please use menu setting to do hard reset or reformat using #option 1 above, but make sure to give checkbox mark at Erase Internal SD card / Internal storage. Then it will reformat the factory default operating system and remove or erase any data inside internal memory.

To reformat or wipe or erase all data at external memory, we can use menu Setting > Storage > Erase Internal Storage / SD Card. Please always make sure all data has already backup before reformat or wipe everything, because it is hard to recover formatted / wiped data at internal or external storage.

How to Make Battery of SAMSUNG GALAXY J7 DUO Stronger, Life Longer and Not Fast to Drain ?

SAMSUNG GALAXY J7 DUO use 3000 mAh battery capacity. This is enough to make this phone work full one day. But if we are very active users, then we need to have backup battery because SAMSUNG GALAXY J7 DUO battery is removable, so we can have several backup battery for worse situations. However, if we do not have backup battery, then please do some adjustment to make SAMSUNG GALAXY J7 DUO battery work longer. Please make LCD screen brightness as low as possible to save battery usage. We also have to disable all not use connections like GPS or Wifi or Bluetooth when we are not use all of them. If we want to use GPS for some applications like main camera to know our location, then please use GPS battery saving mode from menu Setting.

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